Establish exact P-wave duration at the CCTV site

Ascertain the exact duration of P-wave motion at the CCTV location (20.8821°N, 96.0353°E) during the 2025 Mandalay Earthquake to refine the inferred timing and sharpness of the temporary rupture deceleration preceding local slip onset.

Background

The authors infer a sharp deceleration to subshear speeds before the rupture reached the CCTV site, partly using the two-second interval between S-wave arrival and slip onset seen in the video.

They note that the exact P-wave duration at the CCTV site is unclear; pinning down this duration would help better constrain the timing and nature of the velocity transition and associated near-fault ground motion features.

References

While the exact duration of the P-wave at CCTV is unclear, even if the deceleration occurred closer to CCTV, it would not significantly alter the conclusion, given that the P-wave duration in the video is at least three seconds.

— Supershear-subshear-supershear rupture sequence during the 2025 Mandalay Earthquake in Myanmar (2506.09652 - Hirano et al., 11 Jun 2025) in Methods and Results, Subsection Restriction of rupture front